It is member of the dioxazine family of heterocyclic compounds, but derived from carbazoles.

[1] It is prepared by condensation of chloranil and 3-amino-N-ethylcarbazole.

It has a centrosymmetric angular structure.

228-767-9, CAS RN 6358-30-1) which differ in terms of the carbazole ring fusion.

[3] Pigment violet 23 is prepared by condensation of an aniline with chloranil.